

// Do this as the first thing so that any code reading it knows the right env.
process.env.BABEL_ENV = 'test';
process.env.NODE_ENV = 'test';
process.env.PUBLIC_URL = '';

// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on( 'unhandledRejection', err => {
	throw err;
} );

// Ensure environment variables are read.
require( '../config/env' );


const jest = require( 'jest' );
const execSync = require( 'child_process' ).execSync;
let argv = process.argv.slice( 2 );

function isInGitRepository() {
	try {
		execSync( 'git rev-parse --is-inside-work-tree', { stdio: 'ignore' } );
		return true;
	} catch ( e ) {
		return false;
	}
}

function isInMercurialRepository() {
	try {
		execSync( 'hg --cwd . root', { stdio: 'ignore' } );
		return true;
	} catch ( e ) {
		return false;
	}
}

// Watch unless on CI or explicitly running all tests
if (
	!process.env.CI &&
  argv.indexOf( '--watchAll' ) === -1 &&
  argv.indexOf( '--watchAll=false' ) === -1
) {
	// https://github.com/facebook/create-react-app/issues/5210
	const hasSourceControl = isInGitRepository() || isInMercurialRepository();
	argv.push( hasSourceControl ? '--watch' : '--watchAll' );
}


jest.run( argv );
